Heh, looking at that last panel this may be Juri's first girlfriend, but she clearly understands how to lesbian it up already. She's got that unhealthy attachment and life planning thing going on already. Which is kinda delightful.
And that whole thing seems really clingy more than charming, so I doubt it's an act she put on for men.
Also, people act like there's ambiguity but I feel like the author tried to send a very clear flag with the whole "She's no longer desired" thing seemingly being something she was positive towards. It's supposed to show how against her nature it is, and that she has the intent for this to be a real thing. And I'm happy to imagine happily ever after instead of a more realistic cynicism.
They went off and gayed it up forever, and hey they managed to even dodge there being actual cheating which was nice.